Joint of a breast pump



FIG. 1 is a front view of the design for a joint of a breast pump;

FIG. 2 is a rear view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a first perspective view thereof;

FIG. 8 is a second perspective view thereof; and,

FIG. 9 is a third perspective view thereof.

The broken lines shown in the figures depict portions of the joint of the breast pump that form no part of the claimed design. 

CLAIM The ornamental design for a joint of a breast pump, as shown and described. 